Subcaliber attachment.



PATMENTED MAR. 1'5, 1904.

W H BBVANS SUBGALIBER ATTACHMENT. APPLIATION FILED JUNE 8, 1903.

VN0 MODEL.

'IIIII'III port, in the county of F lthe chamber of a gun;

UNITED STATES- Patented 'March 15, 1904.

WILLIAM H. BEvANs, OE BRIIDGEPORT, COr'IIIECTICIIT, AssICNOR ro AMERICAN a BRITISH MANUEACrUEINe COMPANY, OE NEW YORK, N.V Y., A CORPORATION OE NEW YORK.

susoALlBER ATTACHMENT.

SPECIFICATION forming part of Letters Patent No; '754,412,6.ated March 15,

Application led June 8,1903. Serial No. 160,494- l(No model.)

To all whom, t may concern:

z Be it known that 1, WILLIAM H. BEvANs, a citizen of the United States, residing at Bridgeaireld and State of Connecticut, have invented certain new and useful Improvements in Subcaliiber Attach- Irnents, of which the following isa specifica- Ion.

This invention relates to improvements in subcaliber attachments; and the object is to provide improved meansV for locking the subcaliber-tube in position in the gun with which it is used.

"Vith the above object in view the invention consists in the novel features of construction hereinafter fully described', particularly pointed out in the claims, andv clearly illustrated by the accompanying drawings, in Which Figure 1 is a sectional view showing my improved subcaliber attachment in position lin Fig. Q, ari-enlarged sectional view of the rear support or adapter for the subcaliber-tube; Fig. 3, a face view of the same; Fig. 4, a detail of the lock for clamping the tube in the'adapter, and Fig. 5 a face view of the forward support or adapter.

' Referring now more particularly to the drawings, 1 designates the body'of the gun, 2 the powder-chamber thereof, and 3 the mushroom. 1

4 designates the forward adapter, which is positioned in the chamber 2 and abuts against the shoulder formed at the forward end thereof, said adapter or support being provided with a centrally-disposed internally-threaded opening to receive the subcali'b'er tube et', which isprovided with external threads near its forward end. The tube is thus centered at its forward end by the adapter, in which it may be adjusted longitudinally. In the instance shown the breech-opening of the gun being smaller thanthe'chamber it is necessary( that the rear adapter be smaller than the chamber and be provided with means for locking it in the chamber after it'has been inserted therein. To accomplish this, I provide a shoe 5, independent of the adapter, having its upper and lower faces formed on the arc of 'a cir- 'cle and provided with a' handle 6, by means of which it may be inserted in the chamber. This shoe is formed at its upper rear edge with a ange 7 to prevent rearward movement of the adapter 8, which seats thereon and is held n.

from lateral movement by anges 9, engaging at each end of the shoe., Said adapter is formed with a screw-threaded bearing 10 for the tube, which is also threaded'near its rear` end, said bearing being split vertically and provided with a clamping-screw 11, by means l of whichthe split portions may be drawn to' gether to lock the gun from longitudinal movement in the adapters. At its upper end said adapter is provided with a vertical recess 12 to receive a clamping member or block 13, formed with guide-lugs 14, sliding'in suitable grooves formed in the walls of recess 12.

The upperl face of the block is formed on a radius equal to that of the chamber 2, while its lower face -is-formed with an incline'or- .cam-surface 15. Adapted to slide in said re cess beneath the block and to coact with its y inclined face is a wedge member 16, with vwhich an operating-screw nected, said screw being adj'fustable in the adapter by means of screw-threads. Said wedge is provided with guide-flanges 18, which slide in suitable grooves in the walls of recess 12.

"In operation. the frontand rear adapters are screwed upon the subcaliber-tube and the latter inserted in the chamber of the'gum The tube is thenv lifted and the shoe inserted b eneath the rear adapter and the wedge then op.

erated to force the block in engagement with the chamber-wall, thus rmlylocking the tube from movement 1n the gun.

Having thus 'fully described my invention,

what I claim as new, and desire to secure by Letters Patent of the United States, is

1. In a? subcaliber attachment,a support for the tube provided with means in position in the gun-chamber 'comprising a sliding clampin member having a cam-surface, a wedge a apted to coact with saidcamfor locking it` 17 is otatively cone I' the rear end of the ,15

surface to effect the ing member, and

Wedge.

2. In a subcaliber attachment, a support for the tube provided With inposition in the gun-chamber comprising 4a means for adjusting the sllding clampingmember having a cam-surmovement of thegclamp the, tube having a 4block slidable in said recess 'having its outer means for locking it.

,Wall of thechamber, and means for HGSSGS.

member in `Contact.5A

cam-surface to -force said and means With thewall'of the gun-chamber, Yfor operating said wedge. i

4. In a subcaliber attachment, a support for 'K recess formed therein, 'a

surface formed onthe same radius as the rae; dius of. the Wall of the gunchamber and fha-ving an inner cani-surface, a Wedge slidable in said recess and adapted to coa'ct with said camsurface to force the block in contact with the y l effecting the movement ofsaid wedge.- v

In testimony whereof I'have signed my name to this *specification -in presence of two Wit- WILLIAM H. BEVANS. Witnesses :I

' BQ C. LroN,

L. BRADsTREET. f 

